Automobile message sign



FIG. 1 is a perspective view of an automobile message sign showing my new design, with the cord broken away to indicate indeterminate length and with broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an automobile message sign, as shown and described. 